Hackers are exploiting an authentication bypass vulnerability (CVE-2026-35616) in FortiClient Enterprise Management Server (EMS) to deliver an undocumented credential stealer called EKZ.

CVE-2026-35616, a FortiClient EMS zero-day vulnerability patched in April, has been exploited in fresh infostealer attacks.

FortiClient EMS flaw CVE-2026-35616 enabled malware delivery via fake updates, risking credential theft across endpoints.